tree beb7fd2471690bbd8b0d0982c3b1f40f6784adba
parent a5f04b9df1113e0c16271afe5e43028f0d763f13
author Jiri Kosina <jkosina@suse.cz> 1366152009 -0700
committer Jiri Kosina <jkosina@suse.cz> 1367309371 +0200

HID: protect hid_debug_list

Accesses to hid_device->hid_debug_list are not serialized properly, which
could result in SMP concurrency issues when HID debugfs events are accessesed
by multiple userspace processess.

Serialize all the list operations by a mutex.

Spotted by Al Viro.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>